地理学报

地理学报 ›› 1991, Vol. 46 ›› Issue (4): 470-479.doi: 10.11821/xb199104009

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我国七、八月等压面位势高度准两周振荡特点及其与夏季风强度和北方降水的关系

巢俊民   

  1. 北京师范大学地理系
  • 出版日期:1991-10-15 发布日期:1991-10-15
  • 基金资助:
    国家自然科学基金资助项目

THE CHARACTERISTICS OF THE QUASI-TWO WEEKS OSCI-LLATION OF ISOBARIC SURFACE'S GEOPOTENTIAL HE-IGHT OVER CHINA AND ITS RELATIONSHIPS WITH THE SUMMER MONSOON STRENGTH AND THE RA-INFALL OVER THE NORTHERN PART OF CHI-NA FROM JULY TO AUGUST

Chao Junmin   

  1. Department of Geography, Beijing Normal Univerrity
  • Online:1991-10-15 Published:1991-10-15

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2

摘要： 本文用功率谱分析和频带滤波等方法对1981年7、8月我国46个高空观测站的08h850hPa到200hPa等压面的位势高度进行了分析,指出了等压面位势高度准两周振荡强度、垂直结构和移动特点,以及它与夏季风强度和北方地区降水的关系。

关键词: 准两周振荡, 功率谱分析, 交叉谱分析, 频带滤波

Abstract: In this paper, the data of 850hPa to 200hPa isobaric surface's geopotential heights available at 08h from 46 upper air observation stations from July to August. over China are analysed by using the methods of spectrum analysis and frequency band filtering, etc., which show the ‘characteristics of the quasi一two weeks a}scillation's strength, structure and movement of iso-baric suface's geopotential heights and also its relationships with the summer mosoon strength and the rainfall over the northern part of China from July to August.

Key words: Quasi-two week oscillation, Power spectrum analysis, Cross spectrum ana-lysis, frequency band filtering